IDEXX Laboratories rises 21.88% to lead a session split by sector

As seen on the 24/7 Wall St. homepage on November 2, 2026.

Biggest movers · At the close
Gainers
  • IDXXIDEXX Laboratories$671.82+21.9%
  • TEMTempus AI$79.36+9.9%
  • RIVNRivian$13.1+7.7%
  • HWMHowmet Aerospace$212.78+6.8%
  • BAMBrookfield Asset Management$51.37+6.4%
Losers
  • LITELumentum$683.66-18.7%
  • MRVLMarvell Technology$171.11-12.9%
  • ALABAstera Labs$229.63-11.2%
  • AAOIApplied Optoelectronics$62.38-9.7%
  • CRWVCoreWeave$49.85-9.2%

IDEXX Laboratories closed up 21.88%, the single largest move in a 383-name universe. Lumentum and Marvell sat at the other end of the session.

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IDEXX Laboratories rose 21.88% on November 2, 2026, the largest single-session gain in the 383-name universe. Diagnostics led while optical and semiconductor names fell.

Tempus AI, Rivian, Howmet Aerospace and Brookfield Asset Management also gained, none close to IDEXX.

Sponsored

Lumentum, Marvell Technology, Astera Labs, Applied Optoelectronics and CoreWeave led the decliners.

Investors ignoring the sector split miss where the session's money actually moved.

Sources

Mentioned: IDXX, TEM, RIVN, HWM, BAM, LITE, MRVL, ALAB

Related Market Updates

IDXX IDEXX Laboratories
Regular session
$669.00
+7.04% open $625.00
$673$654$635

A 7.04% jump to $669 follows the Q3 earnings beat, a rare one-day move for a $52.7 billion diagnostics name that usually grinds rather than gaps. Keep an eye on whether it holds the level into the close.

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BAM Brookfield Asset Management
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$51.74
+5.95% open $48.83
$53$51$49

A 5.95% intraday run to $51.74 adds roughly $4.9 billion to an $82.6 billion asset manager, a rare single-session move for a name that usually trades like a fee-stream annuity. Whether it holds into the close is the tell.

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LITE Lumentum
Regular session
$702.47
-12.20% open $800.12
$768$728$688

The 12.2% drop lands the same day Lumentum posted a Q1 FY2027 earnings beat alongside a no-premium Marvell deal, putting the merger terms in front of the results for holders. Moves this size are rare for a $63.6 billion name.

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TEM Tempus AI
Regular session
$83.26
+12.07% open $74.29
$84$78$72

Tempus AI's Q3 earnings beat added roughly $1.5 billion of market value in one session. Whether the move holds through the close is the question for anyone still deciding on AI diagnostics.

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RIVN Rivian
Regular session
$13.53
+5.95% open $12.77
$14$13$13

A 5.95% intraday run to $13.53 adds better than a billion dollars to a roughly $20 billion market cap in one session. Moves this size rarely stay quiet in this name, so keep an eye on whether it holds into the close.

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Biggest movers · On the open
Gainers
  • IDXXIDEXX Laboratories$641.25+16.3%
  • RIVNRivian$13.09+7.6%
  • MARMarriott International$420.95+5.4%
  • CAVACava$61.59+4.8%
  • BABAAlibaba$102.69+4.7%
Losers
  • LITELumentum$750.01-10.8%
  • CIFRCipher Digital$6.82-6.5%
  • EQNREquinor$46.03-5.6%
  • MRVLMarvell Technology$186.03-5.3%
  • ORCLOracle$124.13-5.0%

IDEXX Laboratories opened 16.33% higher, the largest single move across a 380-stock priority universe today. Lumentum anchors the other end, with Oracle and Marvell also lower.

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Wall St. Engine @wallstengine

Management is framing the $115 billion all-stock Lumentum deal as a top-five AI silicon franchise, which sets the bar both stocks will be judged against after their selloff on the announcement.

MARVELL $MRVL CEO: EXPECT COMBINED CO WITH LUMENTUM $LITE TO BECOME ONE OF THE TOP FIVE LARGEST AI INFRASTRUCTURE SEMICONDUCTOR COMPANIES
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LITE Lumentum
Q1 2027
EPS
$4.57
est $4.22 +8.2%
Revenue
$1.26B
est $1.25B +0.7%

A second major NPO/CPO design win carries more than $5 billion in purchase commitments, and Lumentum says optoelectronic capacity is effectively sold out. EPS topped expectations, and guidance points to higher revenue next quarter.

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TEM Tempus AI
Q3 2026
EPS
$0.07
est -$0.08 +191.5%
Revenue
$412M
est $409M +0.6%

Tempus AI turned its first adjusted profit, exceeding expectations that called for a loss, and raised full-year revenue guidance to roughly $1.6 billion.

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IDXX IDEXX Laboratories
Q3 2026
EPS
$4.01
est $3.72 +7.9%
Revenue
$1.21B
est $1.19B +1.8%

Management raised full-year EPS guidance to $14.96-$15.16, and the premium instrument installed base keeps that recurring diagnostics revenue compounding.

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IDXX IDEXX Laboratories, Inc.
Reports Mon Nov 2 Before open 6:30 AM ET Confirmed

Sixteen straight quarters of EPS beats are on the line when IDEXX reports at 6:30 AM ET, with consensus at $3.716 EPS on $1.19 billion in revenue. Pet owners trimming vet visits is the one thing that ends the run.

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